package net.xiduth.io.io.File;

/*
 * Copyright 2007 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/* @test
 @bug  6526376
 @summary DeleteOnExitHook.add() produces NullPointerException
 */

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;

/* NullPointerException in exec'ed process if fails.
 * This testcase is timing sensitive. It may sometimes pass even with this bug
 * present, but will never fail without it.
 */

public class DeleteOnExitNPE implements Runnable {
	public static void main(String[] args) throws Exception {
		if (args.length == 0) {
			runTest();
		} else {
			doTest();
		}
	}

	public static void runTest() throws Exception {
		String cmd = System.getProperty("java.home") + File.separator + "bin"
				+ File.separator + "java";
		Process process = Runtime.getRuntime().exec(
				cmd + " DeleteOnExitNPE -test");
		BufferedReader isReader = new BufferedReader(new InputStreamReader(
				process.getInputStream()));
		BufferedReader esReader = new BufferedReader(new InputStreamReader(
				process.getErrorStream()));

		process.waitFor();

		boolean failed = false;
		String str;
		while ((str = isReader.readLine()) != null) {
			failed = true;
			System.out.println(str);
		}
		while ((str = esReader.readLine()) != null) {
			failed = true;
			System.err.println(str);
		}

		if (failed)
			throw new RuntimeException(
					"Failed: No output should have been received from the process");
	}

	public static void doTest() {
		try {
			File file = File.createTempFile("DeleteOnExitNPE", null);
			file.deleteOnExit();

			Thread thread = new Thread(new DeleteOnExitNPE());
			thread.start();

			try {
				Thread.sleep(2000);
			} catch (InterruptedException ie) {
				ie.printStackTrace();
			}

			System.exit(0);
		} catch (IOException ioe) {
			ioe.printStackTrace();
		}
	}

	public void run() {
		File file = new File("xxyyzz");

		try {
			for (;;) {
				file.deleteOnExit();
			}
		} catch (IllegalStateException ise) {
			// ignore. This is ok.
			// Trying to add a file to the list of files marked as deleteOnExit
			// when
			// shutdown is in progress and the DeleteOnExitHook is running.
		}
	}
}
